Four works in seven volumes, 4to and large folio, all in original cloth, unless otherwise stated, condition generally very good. Including:

Becker, George F.
Geology of the Quicksilver Deposit of the Pacific Slope, with an atlas.
Washington, D.C., 1888. Text and atlas volumes (atlas disbound).

Hague, Arnold.
Geology of the Eureka District, Nevada, with an atlas. Washington, D.C., 1892. Text and atlas (atlas disbound).

Spurr, Josiah Edward.
Geology of the Aspen Mining District, Colorado, with atlas.
Washington, D.C., 1898. Text and atlas volumes.

Clements, J. Morgan.
Atlas to Accompany Monograph XLV on the Mining-Bearing District of Minnesota.
Washington, D.C., 1903. Atlas volume only.